I have been using chevy for the last 5 years and I think I got it overheated just once. I know keeping chevy here is not really just like any other local car and its maintenance cost is higher but still, a lot of bad words you find online aren't real. If your car is well maintained then I can guarantee it will not overheat so frequently. I heavily use AC by the way.
One more thing I often read here about the clutch cable issue, even one person was saying that I keep extra clutch cable in the car as it can break anywhere but in 5 years of my experience with chevy, I think my clutch cable caused issue just once or maybe twice. People actually use Mehran's local clutch cable and then complain that the car has clutch cable issue. Get the original cable and I can guarantee it will not cause so frequent issues.
I didn't get well your question about price.
Please only buy if you get some car in excellent condition, stay away from bad conditioned or rough conditioned chevy.